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Why is my urine yellow in summer, and what should I do?

Aug 18, 2025 Source: Cainiu Health
Dr. Yang Guang
Introduction
Bacteria ascend through the urethra to infect the renal pelvis, causing inflammation of the renal pelvis, which affects the kidney's filtration function. This leads to the presence of white blood cells, bacteria, and other substances in the urine, causing the urine to darken and turn yellow. Symptoms may include back pain, fever, chills, and others. It is recommended to use medications such as amoxicillin-clavulanate potassium tablets, cefotaxime sodium injection, and compound sulfamethoxazole tablets under the guidance of a physician for treatment.

Yellow urine during summer may be caused by excessive sweating, dietary influences, urethritis, pyelonephritis, hemolytic diseases, or hepatobiliary calculi. It can usually be managed by increasing hydration, adjusting diet, or medication. If abnormalities persist, prompt medical attention is recommended. Detailed explanations are as follows:

1. Excessive sweating: In summer, high temperatures cause increased perspiration, leading to significant fluid loss and concentrated urine. The elevated pigment concentration in urine results in a darker yellow color. It is recommended to increase water intake to replenish lost fluids, dilute urine, and alleviate the yellow discoloration.

2. Dietary influence: Consuming excessive spicy or irritating foods, or foods rich in pigments such as carrots and pumpkin during summer may increase pigment content in urine, causing it to appear yellow. It is advised to adjust the diet by reducing intake of such foods and consuming more bland and easily digestible meals.

3. Urethritis: In summer, bacteria multiply actively, making the urethra prone to infection and inflammation. Inflammatory irritation damages the urethral mucosa, causing inflammatory substances to mix into the urine, turning it yellow. Symptoms may include frequent urination, urgency, and a burning sensation in the urethra. Doctors generally recommend medications such as Cefaclor Capsules, Azithromycin Dispersible Tablets, or Minocycline Hydrochloride Capsules for treatment.

4. Pyelonephritis: Bacteria may ascend from the urethra to the renal pelvis, causing infection and inflammation of the renal pelvis. This affects the kidney's filtration function, resulting in the presence of white blood cells and bacteria in the urine, which causes dark yellow urine. Symptoms may include back pain, fever, and chills. It is recommended to take medications such as Amoxicillin and Clavulanate Potassium Tablets, Cefotaxime Sodium Injection, or Compound Sulfamethoxazole Tablets under a doctor's guidance.

5. Hepatobiliary calculi: Obstruction of bile ducts by stones can lead to impaired bile excretion, allowing bilirubin to reflux into the bloodstream and be excreted through urine, causing dark yellow urine. Symptoms may include right upper abdominal pain, nausea, vomiting, and skin itching. Doctors may prescribe anti-inflammatory and bile-promoting medications such as Xiaoyan Lidan Tablets, Ursodeoxycholic Acid Tablets, or Chenodeoxycholic Acid Capsules for treatment.

In daily life, it is important to maintain adequate hydration during summer, shower regularly, change clothes frequently, practice good personal hygiene, and avoid holding urine to reduce the risk of urinary tract infections and maintain normal metabolic functions.

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